Intent is an abstract description of an operation to be performed. To be more specific, it is an asynchronous call which allows the application to request functionality from other Android components, for example, services/activities. It can be used with the startActivity() command to launch an activity. The previous code in SimpleNumb3r5.java is the main activity (or class) for this application. We've just created the second activity (class) in the file Info.java. In order for the second activity to appear, it has to be started using an intent.
We have decided to use the button btninfo as the trigger to invoke the second activity. Again, open the file SimpleNumb3r5.java and add the following lines to invoke another activity. These lines must be added to the btninfo button's onClick method. Notice that an instance of Intent is created as info. The main class is able to call the second class using the startActivity() method. The Info.class argument is referring...